- decreases
- increases
- reduces to zero
- remain unchanged
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Hall effect is observed in a specimen when it is carrying current and is placed in a magnetic field. The resultant electric field inside the specimen is?
Answer: Option 1 Let'
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Hall effect is observed in a specimen (metal or semi conductor) when it is carrying current and is placed in a magnetic field. The resultant electric field inside the specimen is?
Answer: Option 1 Let'
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When a dielectric material is subjected to alternating field, the absorption of energy by the material from the field is given by the imaginary part of polarizability.?
Answer: Option 1 Let'
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Theoretically electromagnetic radiation field strength varies in inverse proportion to the square of the distance, but when atmospheric attenuation effects and the absorption of the terrain are taken into account the attenuation can be as high as the inverse ___________ power of the distance.?
Answer: Option 4 Let'
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The loss of strength in compression which occurs, when there is a gain of strength in tension due to over loading is called?
Answer: Option 1 Let'
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Elastic failure of a material occurs, when the tensile stress equals yield strength, yield point or the elastic limit. Also, the elastic failure occurs according to maximum strain theory, when the maximum tensile strain equals (where, σ = yield strength and E = modulus of elasticity)?
Answer: Option 3 Let'
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Directions : In each of the following questions a statement is given, followed by two conclusions. Give answer : Statements : Wind is an inexhaustible source of energy and an aerogenerator can convert it into electricity. Though not much has been done in this field, the survey shows that there is vast potential for developing wind as alternative source of energy. Conclusions : I. Energy by wind is comparatively newly emerging field. II. The energy crisis can be dealt by exploring more in the field of aero-generation.?
Answer: Option 5 The phrase 'not much has been done in this field' indicates that wind energy is a comparatively newly emerging field. So, I follows. The expression 'there is...
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Directions : Following question consists of a statement followed by three arguments I, II and III . You have to decide which of the arguments is a STRONG arguments and which is a WEAK Argument. Statement : Should coal engines be replaced by electric engines in trains Arguments : I. Yes. Coal engines cause a lot of pollution. II. Yes. Electric engines are good on performance, easy to operate and low on maintenance. III. No. India does not produce enough electricity to fulfil its domestic needs also.?
Answer: Option 2 Clearly, electric engines shall be smoke-free and thus not cause pollution as the coal engines. They also run at higher speeds and perform better. Thus, both I...
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Which medium has the least dielectric strength ?
Answer: Option 4 Let'
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Which of the following expression is correct for electric field strength ?
Answer: Option 1 Let'
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